If a Commission user cannot see the other documents you uploaded, this is because these are type 'Other Member State Document' and are sent independently (as you can see below there is no 'sent date') of the Object (PA, OP, RDP IR etc.).
The following steps should be taken for each document in order for them to be sent to the EC:
Select the document to be sent (1) and click on the edit button (2):
Click on the Update &Send link to send the document to the EC:
